OK, I didn't count seat by seat, but most of the blocks of four had one or two pax in them, most blocks of three had one or two, the exceptions being families travelling together. Even a group of around 25 Kenyan school kids were split up to give them plenty of room. So maybe I exaggerated, half-full?
And my point about the bags was indeed aimed at the airport rather than EK. The carousel is either faulty, or not fit for purpose. A shame when everything else was pretty slick.